see https://github.com/herumi/xbyak/issues/255
> Proof: https://godbolt.org/z/9vseq4Ynj
> Xbyak currently implements it as:
> ```c++
> void umonitor(const Reg& r) {
> int idx = r.getIdx();
> if (idx > 7) XBYAK_THROW(ERR_BAD_PARAMETER) //umonitor DOES accept r8,r9,r10,etc this is NOT correct
> int bit = r.getBit();
> if (BIT != bit) {
> if ((BIT == 32 && bit == 16) || (BIT == 64 && bit == 32)) {
> db(0x67);
> } else {
> XBYAK_THROW(ERR_BAD_SIZE_OF_REGISTER)
> }
> }
> db(0xF3); db(0x0F); db(0xAE); setModRM(3, 6, idx);
> }
> ```
> My program was throwing Xbyak::Exception and I tracked it down to this particular umonitor
Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3954
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
lizzie
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